National Stock Number:
4140-99-168-8982
Federal Supply Class:
4140
National Item Identification Number:
991688982
Description:
FAN,VENTILATING
Detail:
A nonpositive displacement mechanical device having either an axial or centrifugal fan impeller. It is designed to move free air or gas from indoors to outdoors or vice versa over a wide range of volumes at low pressures. It is supported by a ring, plate, or shroud or may be inclosed in a housing. It is designed for installation in a window, roof or wall opening, or the like.
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